[Bug target/106531] -march=rv32iabmc should also enable zba, zbb, zbc, zbs

[andrew at sifive dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106531

--- Comment #3 from Andrew Waterman <andrew at sifive dot com> ---
The lengthy-ISA-name problem will be addressed to a great extent by the
forthcoming introduction of ISA profiles.  Although I agree the status quo is
ugly and overly verbose, I recommend against introducing GCC-specific syntax
for shortening ISA strings, since it'll quickly become legacy.